Pasadena Roofing Contractor for Homes & Businesses
TopCal Roofing handles roof replacement, roof repair, tile, shingle, TPO, torch-down, and emergency roofing across Pasadena, the San Gabriel Valley, and Los Angeles County.
Get Your Free Roof Inspection
Fast response during business hours. Emergency calls answered 24/7.
🔒 Your info is private. No spam, ever. Or call us directly at (626) 399-9951
Why Property Owners Choose TopCal
Industry-recognized, community-trusted — the credentials that set us apart from every other roofer in Los Angeles County.
🏆 Top Roofing Company 2025
Named San Gabriel Valley's Best Roofing Company for 2025 — recognized for excellence in craftsmanship, service, and customer satisfaction.
Owens Corning Preferred Contractor
Certified by Owens Corning — North America's largest roofing manufacturer — meaning access to enhanced warranties and the highest-quality materials available.
CSLB Licensed & Insured
Fully licensed by the California State License Board (#1112937) and fully insured — protecting your property and your investment from day one.
5-Star Rated Across Platforms
Top-rated on Google, Yelp, Angi, BBB, Thumbtack, and BuildZoom. Over 500 completed projects with an unblemished 5-star reputation.
Owens Corning Partner
Certified Owens Corning contractor, giving customers access to premium roofing systems and exclusive manufacturer warranties on every installation.
Malarkey Certified Installer
Authorized Malarkey installer — delivering industry-leading shingles with superior wind resistance, impact rating, and environmental performance.
Roofing Services for
Homes, HOAs & Commercial Buildings
Whether you own a single-family home or a large commercial complex, TopCal delivers expert roofing solutions for every property type — on time and on budget.
Residential Roofing
Complete solutions for single-family and multi-family homes — new installs, re-roofing, full replacements, and repairs using Owens Corning premium shingles.
Get Instant EstimateCommercial Roofing
TPO, EPDM, torch-down, and coatings for offices, retail centers, warehouses, HOAs, and industrial buildings — engineered for longevity with minimal disruption.
Request Commercial QuoteRoof Replacement
Full roof tear-off and replacement using premium materials. We handle all permits, disposal, and leave your property spotless after every job.
Get Free QuoteRoof Repair & Maintenance
Expert diagnosis and repair of leaks, damaged flashing, cracked tiles, and structural issues — preserving your roof and preventing costly damage.
Get Free QuoteSolar-Ready Roofing
Future-proof your home with a solar-ready roof installation — reinforced decking, upgraded flashing, and optimized layout for maximum solar output.
Get Free QuoteEmergency Roof Repairs
Storm damage? Active leak? We provide 24/7 rapid-response emergency service across all of LA County — same-day inspections available.
Call Now 24/7Roof Types We Install
Across Pasadena & LA County
TopCal installs every major roofing system — from Owens Corning architectural shingles for homes to TPO, torch-down, and EPDM flat-roof systems for commercial properties. Every install meets manufacturer specs and comes backed by a workmanship warranty.
Asphalt Shingle
The most popular roofing material in California — asphalt shingles offer an unbeatable combination of affordability, durability, and curb appeal. Available in architectural (dimensional) and 3-tab styles in dozens of colors.
- Lifespan: 20–30 years
- Impact-resistant options (Class 4)
- Owens Corning & Malarkey brands
- Best value for residential roofs
Concrete & Clay Tile
A signature of Southern California architecture — clay and concrete tiles provide unmatched longevity, natural insulation, and a timeless Mediterranean or Spanish-style aesthetic ideal for LA County homes.
- Lifespan: 40–50+ years
- Fire-resistant (Class A rated)
- Naturally insulating — lowers energy costs
- Perfect for California climate
TPO (Thermoplastic Polyolefin)
The industry's leading single-ply flat roofing membrane — TPO offers outstanding UV resistance, heat-welded seams for superior leak protection, and ENERGY STAR® compliance for commercial buildings in California.
- Lifespan: 15–25 years
- ENERGY STAR® certified — reduces cooling costs
- Heat-welded seams — zero leak points
- Ideal for flat & low-slope roofs
Torch Down (Modified Bitumen)
A durable, heat-applied roofing system for flat and low-slope roofs — torch-down (modified bitumen) creates a seamless, waterproof membrane that handles the thermal expansion of California's hot summers exceptionally well.
- Lifespan: 15–20 years
- Seamless — eliminates leak-prone seams
- Superior UV & heat resistance
- Excellent for flat commercial roofs
Picture Framing
A specialized flat-roof finishing technique where a raised perimeter border frames the roof edge — creating a clean, architectural look while reinforcing waterproofing at the most vulnerable edge sections of the roof.
- Enhanced waterproofing at roof edges
- Architectural, finished appearance
- Combined with TPO or Modified Bitumen
- Ideal for commercial & modern residential
Flat Roof Systems (EPDM)
EPDM (ethylene propylene diene monomer) is a premium rubber roofing membrane widely used on commercial flat roofs. Highly resistant to ozone, UV rays, and temperature extremes — making it ideal for year-round California conditions.
- Lifespan: 20–30 years
- Ozone & UV resistant
- Low maintenance requirements
- Excellent for large commercial buildings
Metal Roofing
Modern metal roofing systems — including standing seam and metal shingles — deliver unparalleled longevity, fire resistance, and energy efficiency. Increasingly popular for both upscale residential properties and commercial applications in California.
- Lifespan: 40–70 years
- Class A fire rating
- Reflects solar heat — reduces AC costs
- 100% recyclable material
Roof Coatings & Restoration
Extend the life of an existing roof by 10–15 years with a professional elastomeric or silicone coating system — a cost-effective alternative to full replacement that meets California Title 24 cool-roof energy requirements.
- Extends roof life 10–15 years
- Meets CA Title 24 energy standards
- Reduces building cooling costs 20–30%
- Most cost-effective option available
Wood Shake & Cedar Shingles
Classic wood shake and cedar shingles offer a natural, rustic aesthetic that complements craftsman and bungalow-style homes throughout Pasadena and the San Gabriel Valley — with proper fire treatment meeting California building codes.
- Lifespan: 20–30 years with maintenance
- Fire-treated to meet CA code
- Natural insulation properties
- Perfect for craftsman-style homes
Expert Commercial Roofing
for Every Building Type
From small retail storefronts to large industrial complexes, TopCal delivers commercial roofing systems engineered for maximum durability, energy efficiency, and minimal business disruption — on schedule and on budget.
TPO Membrane
Single-ply thermoplastic membrane — the #1 commercial flat roofing choice in California. Heat-welded seams create a fully monolithic waterproof layer with ENERGY STAR® compliance.
- Lifespan: 15–25 years
- Reflects UV — lowers AC costs up to 30%
- Heat-welded seams — zero leak points
- Ideal for flat & low-slope roofs
- Title 24 & ENERGY STAR® compliant
Torch Down / Modified Bitumen
A battle-tested, heat-applied asphalt system ideal for flat and low-slope commercial roofs. Creates a seamless, high-tensile waterproof membrane that handles California's thermal expansion exceptionally well.
- Lifespan: 15–20 years
- Seamless application — no weak joints
- Exceptional UV & heat resistance
- 2-ply & 3-ply system options
- Cold-applied option available (fire sensitive areas)
EPDM Rubber Roofing
Premium ethylene propylene diene monomer (EPDM) rubber membrane — highly resistant to ozone, UV, and extreme temperatures. The go-to solution for large commercial flat roof surfaces.
- Lifespan: 20–30 years
- Ozone & UV resistant
- Handles extreme temperature swings
- Low maintenance over entire lifespan
- Excellent for large building footprints
Roof Coatings & Restoration
Extend the life of an existing commercial roof by 10–15 years without a full tear-off — saving 40–60% vs. replacement. Silicone, acrylic, and polyurethane coatings restore waterproofing and reflectivity.
- Saves 40–60% vs. full replacement
- Extends roof life 10–15 years
- White reflective coating — reduces heat gain
- No tear-off — zero landfill waste
- Silicone, acrylic & polyurethane options
Metal Roofing
Standing seam and corrugated metal systems for commercial and industrial buildings — delivering a 40–70 year lifespan, fire resistance, and solar panel compatibility in a single low-maintenance package.
- Lifespan: 40–70 years
- Fire Class A rated
- Solar-panel ready (standing seam)
- Wind resistant up to 140 mph
- Steel, aluminum & Galvalume options
Picture Framing & Edge Details
Precision edge termination and perimeter picture framing — the most leak-prone area of any flat roof, handled with exacting detail. Combined with TPO or modified bitumen for a watertight finish.
- Reinforced waterproofing at all roof edges
- Clean architectural appearance
- Custom fascia & parapet cap flashing
- Compatible with all flat roof membranes
- Standard on every TopCal commercial install
Who We Serve
Licensed & Bonded
CSLB Lic. #1112937. Fully insured with $2M general liability and workers' comp — protecting your property and your business throughout every project.
Minimal Disruption
We schedule commercial work around your business hours — evenings, weekends, phased sections — so operations never stop. No surprises, no delays.
We Pull All Permits
TopCal handles every permit, inspection, and sign-off required by LA County. You never have to deal with the building department — we own the process start to finish.
Manufacturer Warranties
As an Owens Corning Preferred Contractor, TopCal can issue manufacturer-backed system warranties — not just contractor warranties — giving building owners maximum protection.
Solar & Title 24 Ready
Every commercial install is engineered to California's Title 24 energy code. We prepare roof decks and penetration details for solar panel integration — future-proofing your building.
24/7 Emergency Response
Active leak on your commercial property? We provide same-day emergency response across all of LA County — stopping damage before it becomes a costly business interruption claim.
Simple. Transparent. Stress-Free.
From the first call to the final walkthrough — every step is designed to make your roofing project easy and worry-free.
Free Inspection
Our certified inspector arrives on-site, conducts a thorough assessment, and documents all findings with photos — completely free of charge.
Custom Estimate
We provide a detailed written estimate with transparent, itemized pricing — no hidden fees, no surprises. You choose the materials and timeline.
Expert Installation
Our licensed crew handles all permits and completes the installation with precision — on time, on budget, and with zero compromise on quality.
Final Walkthrough
We walk you through the completed project, confirm your total satisfaction, and provide all warranty documentation before we consider the job done.
Never Wait On Hold.
Get Answers Instantly.
Our AI-powered Virtual Assistant is available 24 hours a day, 7 days a week — schedule a free inspection, ask roofing questions, get estimates, and more. No wait times, no business hours.
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Schedule Free Inspections Instantly
Book at 2am or 2pm — our assistant handles scheduling around the clock.
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Ask Any Roofing Question
From material selection to insurance claims — get expert answers immediately.
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Emergency Response Dispatch
Storm damage or active leak? Our assistant will connect you to emergency crews instantly.
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Instant Financing Pre-Qualification
Check 0% APR financing eligibility in minutes — no impact to your credit score.
Speak with our Virtual Assistant
Call anytime to schedule your free inspection, get a roofing estimate, or ask any question — our assistant is always ready.
Call Now — It's FreeSubmit Request Online
💬 Average response time: under 30 seconds
Pasadena Roofing Experts
with 17+ Years of Experience
Founded in Pasadena and rooted in the San Gabriel Valley, TopCal Roofing has built a strong local reputation for quality workmanship, clear communication, and dependable service for homeowners and businesses across Los Angeles County.
Our team uses manufacturer-approved installation techniques and premium materials from Owens Corning and Malarkey — helping every roof we install stand up to California's demanding climate for decades to come.
What Our Customers
Say About Us
500+ five-star reviews across Google, Yelp, Angi, and BBB. These are real stories from real homeowners and business owners in Los Angeles County.
"TopCal replaced our roof in just 2 days — the crew was professional, clean, and the quality is outstanding. Best contractor experience I've ever had. Highly recommend to anyone in Pasadena!"
"After a major storm damaged our roof, TopCal came out the same day and handled everything — including our insurance claim from start to finish. Absolutely exceptional service."
"Professional from inspection to cleanup — the new roof looks absolutely amazing and the price was very fair. I'd give them 10 out of 10. Don't hesitate to call these guys."
"TopCal was incredibly professional throughout the entire process. My new tile roof looks stunning and I've already had neighbors ask who did the work. Couldn't be happier!"
"Our commercial warehouse needed a TPO re-roof on a very tight schedule. TopCal delivered on time and under budget — the quality is incredible and the crew kept our facility operational throughout."
"I called at 11pm about an emergency leak and someone picked up immediately. By 8am the next morning, the team was on my roof fixing the problem. This is what 5-star service really looks like."
0% APR Financing —
Protect Your Home Now
Don't let budget concerns delay critical roof repairs or replacement. Our flexible financing options make it easy for every homeowner to get the roof they need today.
0% APR — Interest-Free Financing
Qualified customers pay zero interest on approved roofing projects — keeping your monthly payments manageable.
Same-Day Approval Available
Quick and easy application process — many customers receive approval in minutes with no impact to credit score to check eligibility.
Flexible Payment Plans
Choose from 12, 24, 36, or 60-month payment plans tailored to your budget and the scope of your roofing project.
Insurance Claim Assistance
We handle storm damage insurance claims from start to finish — maximizing your payout and minimizing your out-of-pocket costs.
A new roof is one of the most important investments you'll make in your home. With our financing, you can protect your property today without straining your budget.
Call our 24/7 Virtual Assistant at (626) 399-9951
Roofing Service Areas
Across Los Angeles County
From Pasadena to Long Beach, from Santa Monica to Pomona — TopCal Roofing serves every community in Los Angeles County with the same award-winning quality and service.
Trusted Manufacturer Partners & Certifications
Frequently Asked
Questions
Have a question? Our 24/7 Virtual Assistant at (626) 399-9951 can answer anything instantly. Here are the questions we hear most often.
Get Your Instant
Roof Replacement Estimate
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AI Satellite Roof Estimator
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Ready for Your
Free Roof Inspection?
Contact us by phone, online form, or call our 24/7 Virtual Assistant. We respond to all inquiries within 30 minutes during business hours and same-day on weekends.
Office Location
530 S. Lake Ave, Pasadena, CA 91101
Business Hours
Mon–Fri: 7:00 AM – 6:00 PM
Saturday: 8:00 AM – 2:00 PM
Sunday: Closed (Emergency 24/7)
License & Credentials
CSLB License #1112937
Owens Corning Preferred Contractor
Fully Licensed, Bonded & Insured
🏆 Named San Gabriel Valley's Top Roofing Company 2025
Owens Corning Preferred • Owens Corning Certified • Malarkey Authorized
Request Your Free Inspection
Fill out the form and our team will contact you within 30 minutes. Or call (626) 399-9951 anytime.
🔒 Your information is kept private. Or call us anytime at (626) 399-9951